Compound for making peroxid of hydrogen.



HABLES B'. JAGOBS, OF PORT CHESTER, NEW YORK.

COMPOUNIj FOR MAKiNG PEROXID OF HYDROGEN.

No Drawing.

Specification of Letters Patent.

Patented Oct. 21, 1913.

Application filed July 9, 190}. Serial No. 215,915.

To. all whom it may concern Be it known that I, CHARLES B. JAooBs, a citizen of the United States, and a resident of the city of Port Chester, county of Westchester, and State of New York, have invented certain new and useful Improvements in Compounds for Making Peroxid of Hydrogen, of which the following is a specification.

My invention relates to the manufacture of peroxid of hydrogen, and more particularly to a compound to be used in making peroxid of hydrogen.

My invention has for an object the pros vision of a compound, which compound will not materially vary in eificiency with age; also the provisionof a compound which maybe used to prepare a solution of peroxid of hydrogen of known strength when Wanted, which preparation does not require much time or skill; and also the provision of a compound which may be used for the extempo-raneous preparation of a solution oi erox'id of hydrogenwhich without requirmg purification is suitable for medicinal purposes. These and other objects of my invention will more fully appear from the following description.

I have discovered that if any acid which will form a peroxid salt be neutralized with the-peroxid of an alkali metal, there will resuit a peroxid salt of the alkali base of the acid used, the loosely held oxygen of the alkali peroxid having attached itself to the acid radical of the compound, while the alkali metal replaces its equivalent of hydrogen in the usual manner, water being given off in the reaction.

The above stated reaction is notconfined to any particular acid of the class mentioned nor to any particular alkali metal. Under the proper conditions for each individual compound the reaction will take place with any of the alkali metals and with any of the above stated class of acids, whether they be mono-basic, di-basic, or tri-basic, or whether they belong to the organic or to the mineral ferent acids in the class mentioned, three specific cases are given of acids which difler from each other individually but all belonging to. the same general class.

If metaboric acid BO(OH) (a monobasic hydroxy acid of the mineral kingdom) be neutralized with sodium peroxid, there results the peroxid compound of sodium metaborate BO (ONa) formed according to the following equation:

BO (OH) -{l\ a O :BO (ONa) +NaO)H or empirically written HB,O +Na O :NaBO +NaOH.

If carbonic acid o co or empirically written 7 NaHCO,+Na O,:Na,CO,+NaOH.

As an example of a tri-basic organic acid of the above stated class may be taken acid coon oamon) coon ooon which when fully neutralized with sodium peroxid yields'the peroxid salt of normal sodium citrate as expressed by the following empirically written equation:

The extra oxygen of these peroxid salts is so lightly held that on treatment with unacidulated water they part with this oxy gen in such a manner that the water molecule (E o) is oxidized to hydrogen peroxid (H 0 and there is formed a solution oi citric -the generation of an alkaline solution .of'

I oxygen being given 0 thenormal salt ofythe acid used in which the hydrogen peroxid is dissolved. In other words, an alkaline but non-caustic and nonacid solution of peroxid of hydrogen is formedwhen these compounds are dissolved in water. The decomposition by water and hydrogen peroxid is shown for the three specific compounds mentioned by the following empirically written equations:

mentioned the amounts of this extra oxygen are respectively as follows:' metaborate of :duce a solution of sodium peroxid 19.58% by weight; peroxid of sodium carbonate 13.93% by weight;-

peroxid of sodium citrate 15.68% by weight. They are valuable oxidizing agents on account of. their large content of active oxygen and von account of their stability. They are particularly valuable for medicinal' andindustrial urposesbecause they furnish a means of accurately weighing in solid and stable form the amount of oxygen that will be liberated as hydrogen peroxid when these salts are decomposed wlth water. They are also ofspecial value for surgical and medicinal uses becausethey provlde an extemporaneous method of read- 11y producing at the time and place wanted a non-acid and non-caustic but alkaline solution of peroxid of hydrogen of known strength and of any desired strength.

The compounds can be put up in the formof tablets of predetermined weight or strength which merely have to be dissolved m a predetermined quantity of water to proeroxid of hydrogen of known strength an of the most favorable character. i

In order that my invention may be more fully understood, I will specifically describe the method of producing the peroxid salt of sodium metaborate, or metaborate of sodium peroxid,.which is the particular compound I preferably use onvaccount of its large con-' tent of active oxygen, the stability of the product, the cheapness of the raw materials, and the ease of manipulation. After analyzing the raw materials which consist of sodium peroxid and metaboric acid, to ascertain their purity, I calculate the proportion of each -so as to maintain the molecular equivalents of the following equation: 2I-IBO +Na O =2NaBo |-H O,

so that the proportion of 87.4 partsby weight of metaboric acid to 78 parts by weight of sodium. peroxid is actually present in the reaction. Or I may take in place of the metaboric acid the ortho acid on account of its cheapness and on account of the ease with which it may be obtained. This acid is readily converted into the meta acid by well known chemical means, using in this case the, amount of ortho acid required to give on conversion the proper proportion of the meta acid. The metaboric acid is dissolved in water and the solution cooled, preferablybetween a temperature between 5- and 10 C. The calculated amount of sodium peroxid is then added slowly and in fine particles with constant stirring, the solution being preferablysurrounded by a cooling mixture to prevent too great a rise in tem-. perature. Atno time during the operation should the temperature be allowed to go abovesay 20 C., and much better results are obtained both as to the yield and the qualig' quickly drawn oil and the crystals thrown into a suction filter and after being thus dried as much as possible, they are washed first with alcohol and finally with ether to thoroughly remove the water. The compound isinow further dried to remove the water of crystallization and .render it anhydrous. This may be done by lacing it under reduced pressure over sul uric acid for say 24 hours when the material will be foundto be stable for an indefinite length of time. The com ound may now be pressed into tabletshaving a predetermined amount of active oxygen so that when one or more of the tablets are dissolved in a redetermined volume of water, an alkaline, noncaustic solution of peroxid of hydrogen of known strength will be obtained.

While I have obtained the best results by the above specifically described mode of procedure, it is distinctly to be understood that I my invention is not limited thereto, as many changes may be made in the details of the process and in the materials used without departing from the main principles of the .invention and withoutsacrificing its chief advantages.

Havingthus described my invention, what I claim and desire to secure by Letters Pathydrogen.

2. A solid anhydrous compound which when treated with water produces a non-acid and non-caustic solution of peroxid of hydrogen.

3. As an article of manufacture acompound consistin of an anhydrous peroxid saltof the alka ine base of'an acid of the peroxid class, which compound when treated with water produces a non-caustic alkaline solution of peroxid of hydrogen.

4. As an article of manu acture a compound consisting of anh drous metaborate of sodium peroxid, whic compound when 20 treated with water produces a non-acid and non-caustic solution of roxid of hydrogen.

In testimony whereo I have signed my name, to this specification, in the of two subscribing witnesses.

CHARLES JACOBS.

presence 

